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use crate::callback::IntoPyCallbackOutput;
use crate::types::PyAny;
use crate::{ffi, FromPyObject, PyClass, PyObject};
use std::os::raw::c_int;
#[allow(unused_variables)]
pub trait PyDescrProtocol<'p>: PyClass {
fn __get__(
slf: Self::Receiver,
instance: Self::Inst,
owner: Option<Self::Owner>,
) -> Self::Result
where
Self: PyDescrGetProtocol<'p>,
{
unimplemented!()
}
fn __set__(slf: Self::Receiver, instance: Self::Inst, value: Self::Value) -> Self::Result
where
Self: PyDescrSetProtocol<'p>,
{
unimplemented!()
}
fn __delete__(&'p self, instance: &'p PyAny) -> Self::Result
where
Self: PyDescrDeleteProtocol<'p>,
{
unimplemented!()
}
fn __set_name__(&'p self, instance: &'p PyAny) -> Self::Result
where
Self: PyDescrSetNameProtocol<'p>,
{
unimplemented!()
}
}
pub trait PyDescrGetProtocol<'p>: PyDescrProtocol<'p> {
type Receiver: crate::derive_utils::TryFromPyCell<'p, Self>;
type Inst: FromPyObject<'p>;
type Owner: FromPyObject<'p>;
type Result: IntoPyCallbackOutput<PyObject>;
}
pub trait PyDescrSetProtocol<'p>: PyDescrProtocol<'p> {
type Receiver: crate::derive_utils::TryFromPyCell<'p, Self>;
type Inst: FromPyObject<'p>;
type Value: FromPyObject<'p>;
type Result: IntoPyCallbackOutput<()>;
}
pub trait PyDescrDeleteProtocol<'p>: PyDescrProtocol<'p> {
type Inst: FromPyObject<'p>;
type Result: IntoPyCallbackOutput<()>;
}
pub trait PyDescrSetNameProtocol<'p>: PyDescrProtocol<'p> {
type Inst: FromPyObject<'p>;
type Result: IntoPyCallbackOutput<()>;
}
#[derive(Default)]
pub struct PyDescrMethods {
pub tp_descr_get: Option<ffi::descrgetfunc>,
pub tp_descr_set: Option<ffi::descrsetfunc>,
}
#[doc(hidden)]
impl PyDescrMethods {
pub(crate) fn update_typeobj(&self, type_object: &mut ffi::PyTypeObject) {
type_object.tp_descr_get = self.tp_descr_get;
type_object.tp_descr_set = self.tp_descr_set;
}
pub fn set_descr_get<T>(&mut self)
where
T: for<'p> PyDescrGetProtocol<'p>,
{
self.tp_descr_get = py_ternarys_func!(PyDescrGetProtocol, T::__get__);
}
pub fn set_descr_set<T>(&mut self)
where
T: for<'p> PyDescrSetProtocol<'p>,
{
self.tp_descr_set = py_ternarys_func!(PyDescrSetProtocol, T::__set__, c_int);
}
}